The Complexity of Certain Modal Formulas on Binary Ramified Subset Trees

  • Authors:
  • Bernhard Heinemann

  • Affiliations:
  • (Correspd.) Fachbereich Informatik, FernUniversität Hagen, D-58084 Hagen, Germany. email: bernhard.heinemann@fernuni-hagen.de

  • Venue:
  • Fundamenta Informaticae
  • Year:
  • 1999

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Abstract

In the present note we determine the complexity of the satisfiability problem of a certain modal logic of subset spaces which was proposed in [6]. The corresponding semantics is defined w.r.t. binary ramified subset trees consisting of a set X and a distinguished set 𝒪 of subsets of X such that the relation of reverse set inclusion makes 𝒪 a binary ramified tree. It turns out that the satisfiability problem of the logic is complete in NP.